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GE Multilin
B90 Low Impedance Bus Differential System
5-159
5 SETTINGS
5.7 INPUTS/OUTPUTS
5
EXAMPLE 1: EXTENDING INPUT/OUTPUT CAPABILITIES OF A B90 RELAY
Consider an application that requires additional quantities of contact inputs or output contacts or lines of programmable
logic that exceed the capabilities of a single UR-series chassis. The problem is solved by adding an extra UR-series IED,
such as the C30, to satisfy the additional inputs/outputs and programmable logic requirements. The two IEDs are con-
nected via single-channel digital communication cards as shown below.
Figure 5–68: INPUT AND OUTPUT EXTENSION VIA DIRECT INPUTS AND OUTPUTS
Assume contact input 1 from UR IED 2 is to be used by UR IED 1. The following settings should be applied (Direct Input 5
and bit number 12 are used, as an example):
The
Cont Ip 1 On
operand of UR IED 2 is now available in UR IED 1 as
DIRECT INPUT 5 ON
.
EXAMPLE 2: INTERLOCKING BUSBAR PROTECTION
A simple interlocking busbar protection scheme can be accomplished by sending a blocking signal from downstream
devices, say 2, 3 and 4, to the upstream device that monitors a single incomer of the busbar, as shown in the figure below.
Figure 5–69: SAMPLE INTERLOCKING BUSBAR PROTECTION SCHEME
Assume that Phase Instantaneous Overcurrent 1 is used by Devices 2, 3, and 4 to block Device 1. If not blocked, Device 1
would trip the bus upon detecting a fault and applying a short coordination time delay.
The following settings should be applied (assume Bit 3 is used by all 3 devices to send the blocking signal and Direct Inputs
7, 8, and 9 are used by the receiving device to monitor the three blocking signals):
UR IED 2:
DIRECT OUT 3 OPERAND
: "
PHASE IOC1 OP
"
UR IED 3:
DIRECT OUT 3 OPERAND
: "
PHASE IOC1 OP
"
UR IED 4:
DIRECT OUT 3 OPERAND
: "
PHASE IOC1 OP
"
UR IED 1:
DIRECT INPUT 7 DEVICE ID
: "2"
DIRECT INPUT 7 BIT NUMBER
: "3"
DIRECT INPUT 7 DEFAULT STATE
: select "On" for security, select "Off" for dependability
DIRECT INPUT 8 DEVICE ID
: "3"
DIRECT INPUT 8 BIT NUMBER
: "3"
DIRECT INPUT 8 DEFAULT STATE
: select "On" for security, select "Off" for dependability
UR IED 1:
DIRECT INPUT 5 DEVICE ID
= “2”
DIRECT INPUT 5 BIT NUMBER
= “12”
UR IED 2:
DIRECT OUT 12 OPERAND
= “Cont Ip 1 On”
UR IED 1
TX1
RX1
UR IED 2
TX1
RX1
842712A1.CDR
UR IED 1
UR IED 2
UR IED 4
UR IED 3
BLOCK
Summary of Contents for B90
Page 10: ...x B90 Low Impedance Bus Differential System GE Multilin TABLE OF CONTENTS ...
Page 284: ...5 166 B90 Low Impedance Bus Differential System GE Multilin 5 8 TESTING 5 SETTINGS 5 ...
Page 334: ...10 8 B90 Low Impedance Bus Differential System GE Multilin 10 2 BATTERIES 10 MAINTENANCE 10 ...
Page 338: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 460: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 476: ...E 10 B90 Low Impedance Bus Differential System GE Multilin E 1 IEC 60870 5 104 APPENDIX E E ...
Page 502: ...viii B90 Low Impedance Bus Differential System GE Multilin INDEX ...